Improved apparatus for separating ocher from sand



UNITED STATES PATENT OFFICE.

JOSEPH HURSH AND ABRAHAM HURSH, OF PHILADELPHIA, PA.

' IMPROVED APPARATUS FOR SEPARATING OCHER FROM SAND.

Specification forming part of LettersPatent No. 49,273, dated August 8, 1865.

lowing is a full, clear, and exact description thereof, reference being had to the annexed drawings, making a part ofthis specification,

Vin which- Figure l is a perspective view of the separator. Fig. 2 is a vertical section of the same.

Like letters in both figures indicate the same parts ot' the machine.

We would premise that the usual inode ot' obtaining ocher is by means of washing the sand or clay which contains it; but the nature ot' our invention mainly consists in causing the sand containing a portion of ocher to fall upon a current 'ot' air, and to be acted upon by the latter in such a manner that the sand (which is the heavier substance) shall fall and be conveyed, by means ot' a chute or otherwise, to a place ot' deposit, and the ocher--the lighter substanceshall be caused to rise and be conveyed by means of the current of air above the sand and iu'to a place separate therefrom.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

A represents a room, into which the sand is blown through thevtrunk B by means of the tan G in the case D, there being a pulley, E,

on the shaft F, over which a belt passes from the driving-shaft. The trunk B communicates with the conical chamber G, which is built sufticiently high to prevent the air, in its upward course, carrying the sand into the room A, into which the ocher passes. H is a chute, through which the separated sand falls and is passed out of the chamber G.

I is a door ofentrance into the chamber, and J a door of entrance into the room A, as seen in Fig. 2. The top or ceiling A is removed in Fig. l for the purposeof showing the interior of the room A.

K is a hopper, by 'means ot" which the sand is fed into the trunk B, to be operated upon by the fan C.` 4

The operation is as follows: The sand is first dried and bolted, and is then regularly fed into the hopper K, from which it falls into the trunk B. The fan G,revolving at a high ve- 0 locity, forces it into thechamber G, and as the current of air rises when it enters the chamber, the ocher, being much lighter than lthe sand, is separated from it, and is borne upward and over the top of the chamber and falls into the room A, while the sand,in consequence or' its greater weight, falls into the chute H and passes out from the chamber G.

It will be observed that the chamber Grises perpendicularly to the point 1, and then takes an .oblique direction inward to the pointl2. The object ot' this is to have the sand carried `forward against the'perpendicular part of the chamber, where it commences a whirling motion, which facilitates the separation ot' the ocher from the sand and prevents any part of it being carried over the top ofthe chamber.

We have represented the t'an and its appurtenances situated outside of the room A; yet all may be contained within it when desired.

After the ocher has been separated from the sand it is put into au iron vessel over a strong tire and burned, which improves its quality for facing purposes.

rPhe ocher may be used in its pure state or adulterated withcharcoal, stonecoal, or other substances such as are used for facing purposes. 1

Having thus fully described our invention,

what we claim therein as new, anddesire to secure by Letters Patent, is-

1. Separating ocher from the sand which contains itin its natural state by means' ot' a current of air in such amanner that the sand falls, while the ocher is borne forward into a separate place of deposit.

2. The combination of the fan O with the chamber Gand room A, the whole being con structed and arranged in rela-tion to each other substantially as described, and for the purpose specified.

8. Burning the ocher,or subjecting it Vto agreat heat, for the purpose ot' completing its adaptability for facing molds for castings, sub-V stantially as described. i

In testimony that the above is our invention we have hereunto set our hands and afiiXed our seals this 6th day ot' July, 1865.

i `JOSEPH HURsH. [1.. s] ABRAHAM HURsH. p.. sa

Witnesses:

STEPHEN UsTIcK.v i THoMAs J. BEWLEY. 

